<HTML>
<HEAD>
<STYLE>
 .first  { display: inline; color: green; }
 .second { display: block; color: red; }
</STYLE>
<SCRIPT>
var className = "first";
function toggleClass() {
  var node = document.getElementById("foo");
  if (className == "first") {
    className = "second";
  }
  else {
    className = "first";
  }
  node.className = className;
}
</SCRIPT>
</HEAD>
<BODY>
<H1>Changing CLASS test</H1>
<P>Clicking on the button that follows this paragraph 
should change the layout of <SPAN ID="foo" CLASS="first">these words</SPAN>
with respect to the rest of the flow.</P>
<FORM>
<INPUT TYPE="button" VALUE="Toggle class" onClick="toggleClass(); return true;">
</FORM>
</BODY>
</HTML>
